Claude Opus 5 vs GPT-5.6 Sol
Anthropic against OpenAI, costed on the same three workloads. GPT-5.6 Sol is cheaper on all three workloads.
Monthly bill, side by side
| Workload | Claude Opus 5 | GPT-5.6 Sol | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$20,138 | $16,110 | $4,028 (+25%) |
| Document summariser 1,000 single-shot summaries a day |
$2,430 | $1,944 | $486 (+25%) |
| Coding agent 200 twelve-turn sessions a day |
$14,040 | $11,232 | $2,808 (+25%) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Claude Opus 5 | GPT-5.6 Sol | |
|---|---|---|
| Input, per 1M tokens | $5 | $4 (Promotional rate until 2026-11-21 — standard rate $5/M) |
| Output, per 1M tokens | $25 | $20 (Promotional rate until 2026-11-21 — standard rate $30/M) |
| Cached input | $0.5 | $0.4 (Promotional rate until 2026-11-21 — standard rate $0.5/M) |
| Context window | 1M | 922K |
| Maximum output | 128K | 128K |
| Reasoning model | yes | yes |
| Vision | yes | yes |
Run this comparison on your own numbers
Full detail: Claude Opus 5 pricing · GPT-5.6 Sol pricing